Enegg Universal Wireless Bluetooth Hands free Audio Music Streming Receiver, Bluetooth Aux Adapter for Car with Dual Port USB Charger - Support APTX Operating distance: Up to 33ft Frequency range: 2.402GHz-2.480GHz Frequency response: 20Hz-20 KHz Bluetooth Specification: V4.0, Support: HFP, A2DP Compatible with Most Bluetooth Enable Device - Smartphone, Tablet, Laptop, PSP etc.